NEET 2013 (Karnataka) | Atoms and Nuclei Question 46 | Physics

An electron in hydrogen atom makes a transition n₁ $$ \to $$ n₂ where n₁ and n₂ are principal quantum numbers of the two states . Assuming Bohr's model to be valid, the time period of the electron in the initial state is eight times that in the final state. The possible values of n₁ and n₂ are

n₁ = 6 and n₂ = 2

n₁ = 8 and n₂ = 1

n₁ = 8 and n₂ = 2

n₁ = 4 and n₂ = 2

NEET 2013 (Karnataka)

MCQ (Single Correct Answer)

-1

How does the Binding Energy per nucleon vary with the increase in the number of nucleons ?

Decrease continuously with mass number.

First decreases and then increases with increase in mass number.

First increases and then decreases with increase in mass number.

increases continuously with mass number.

NEET 2013 (Karnataka)

MCQ (Single Correct Answer)

-1

Out of Syllabus

$$\alpha $$-particles, $$\beta $$-particles and $$\gamma $$-rays are all having same energy. Their penetrating power in a given medium in increasing order will be

$$\gamma $$, $$\alpha $$, $$\beta $$

$$\alpha $$, $$\beta $$, $$\gamma $$

$$\beta $$, $$\alpha $$, $$\gamma $$

$$\beta $$, $$\gamma $$, $$\alpha $$

NEET 2013

MCQ (Single Correct Answer)

-1

Out of Syllabus

The half life of a radioactive isotope 'X' is 20 years. It decays to another element 'Y' which is stable. The two elements 'X' and 'Y' were found to be in the ratio 1 : 7 in a sample of a given rock. The age of the rock is estimated to be

80 years

100 years

40 years

60 years

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Biology

Zoology

Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution